Epalyn pond liner and Butyl are both known for being high quality materials used for the containment of water in garden ponds. The flexibility of Epalyn and Butyl means they can be readily manipulated into various pond shapes and sizes. They are both durable and stable at extreme weather conditions, UV resistant and can be readily repaired if required.
The technical difference between Epalyn and Butyl is the polymer. To be called Butyl the sheet must contain more than 50% butyl polymer. The polymer is the ingredient that makes the sheet elastic. In most pond grade Butyl there is usually a percentage of EPDM polymer mixed in. Epalyn, however is made with 100% EPDM polymer. EPDM polymer is more readily used around the world in a range of industries as well as for lining ponds and it is generally cheaper.
Epalyn pond liner has a higher specification than Butyl in 60% of tests and equal in the remaining 40%:
| Physical Properties | Epalyn | Butyl |
| Hardness | 65 + 5 IRH | 65 + 5 IRH |
| Modulus at 300% Elongation | min 4.5 Mpa | min 4.5 Mpa |
| Tensile Strength | min 9.0Mpa | min 7.5 Mpa |
| Elongation at Break | min 300% | min 300% |
| Tear Strength | min 30 kN/m | min 20 kN/m |
| Properties after heat ageing 168h/1210C | ||
| Tensile Strength | min 7.5 Mpa | min 6.0 Mpa |
| Elongation at Break min 300% | min 300% | min 200% |
| Ozone Resistance 96h/300C/50 pphm and 80% elongation | No cracks | No cracks |
| Brittle Point | max -400C | max -300C |
Want to order Epalyn Pond Liner?
Visit our pond liner size calculator, insert your pond dimensions to get the exact measurements you require for your pond. The calculator will also give you the price for the size required per pond liner type. You are then ready to place your order.